serialized_nbytes FixedRollKey.serialized_nbytes Shows the size of a fixed roll key when serialized. Output serialized_nbytes, int from desilofhe import Engine engine = Engine() secret_key = engine.create_secret_key() fixed_roll_key = engine.create_fixed_roll_key(secret_key, delta=1) serialized_nbytes = fixed_roll_key.serialized_nbytes